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No image seen in the glasses. Do I need to change the camera?

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Explaining Camera Focus


Camera: Focus We've seen that a real image is formed by light moving through a convex lens. The nature of this real image varies depending on how the light travels through the lens. This light path depends on two major factors:
  • The angle of the light beam's entry into the lens
  • The structure of the lens
The angle of light entry changes when you move the object closer or farther away from the lens. You can see this in the diagram below. The light beams from the pencil point enter the lens at a sharper angle when the pencil is closer to the lens and a more obtuse angle when the pencil is farther away. But overall, the lens only bends the light beam to a certain total degree, no matter how it enters. Consequently, light beams that enter at a sharper angle will exit at a more obtuse angle, and vice versa. The total "bending angle" at any particular point on the lens remains constant. camera-diagram3.gif
As you can see, light beams from a closer point converge farther away from the lens than light beams from a point that's farther away. In other words, the real image of a closer object forms farther away from the lens than the real image from a more distant object. You can observe this phenomenon with a simple experiment. Light a candle in the dark, and hold a magnifying glass between it and the wall. You will see an upside down image of the candle on the wall. If the real image of the candle does not fall directly on the wall, it will appear somewhat blurry. The light beams from a particular point don't quite converge at this point. To focus the image, move the magnifying glass closer or farther away from the candle. camera-diagram2.gif
This is what you're doing when you turn the lens of a camera to focus it -- you're moving it closer or farther away from the film surface. As you move the lens, you can line up the focused real image of an object so it falls directly on the film surface. You now know that at any one point, a lens bends light beams to a certain total degree, no matter the light beam's angle of entry. This total "bending angle" is determined by the structure of the lens.




courtesy of HowStuffWorks.com

on Mar 21, 2008 | Canon PowerShot A520 Digital Camera

1 Answer

IMAGE IS NOT SEEN ON SCREEN BUT MENU IS SEEN


The CCD censor or circuit is faulty. Needs camera shop.

Dec 19, 2012 | Kodak EasyShare C613 Digital Camera

1 Answer

Camera not displaying images as seen through viewfinder. The screen is black. Image controls and info can be seen but the picture is just black. Takes photos which are also black; but previous photos...


A stuck shutter is another common failure mode for digital cameras, particularly for the SD1000. The symptoms of a stuck or "sticky" shutter are very similar to CCD image sensor failure. The camera may take black pictures (for shutter stuck closed), or the pictures may be very bright and overexposed, sometimes with lines, especially when taken outdoors (for shutter stuck open). To confirm a stuck shutter, put the camera in any mode other than "Auto", and turn the flash OFF (you don't want to blind yourself for the next step). Next look down the lens and take a picture. You should see a tiny flicker in the center of the lens as the shutter opens and closes. If no movement is seen, then you likely have a stuck shutter. If so, please see this link for further info and a simple fix that may help.


By the way, my wife's SD1000 also has this problem every once in a while. I easily fix it by using the following steps from the link: powering on the camera, opening and closing the battery door, and flicking the end of the lens barrel with my fingertip (or you can tap it with a pencil as discussed in the link).

Feb 06, 2011 | Canon PowerShot SD1000 Digital Camera

1 Answer

Brand new Canon EOS Rebel XS. Suddenly, image in the view finder is blurry. Auto focus seems to be working, and pictures are coming out fine. But sometimes, the autofocus focuses on the wrong thing, and so...


Next to the viewfinder ther is a diopter adjustment so you can change the focus in the viewfinder. this is so if you need glasses the camera can be set for you. Start by focusing the camera on something, then slide to turn the diopter adjustment until it looks sharp and try not to bump it.

Jun 21, 2010 | Canon EOS Rebel XS 35mm SLR Camera

1 Answer

Misty Images


Ouch!
  1. Make sure lens is clean on both ends. Use a lens cleaner NOT glass cleaner & use a cleaning glasses cloth. No paper.
  2. If that does not solve problem you have moisture (condensation )on you image pickup. you can take lens off let camera air out place clean lent free towel over opening to keep particles out off camera.
  3. If that does not work you will have to have it cleaned by a repair shop.
Going from hot or clod environments or wet climates can cause moisture to gather on image sensor & inside camera always try to keep camera in a camera bag & avoid sudden temperature changes.

Mar 08, 2009 | Nikon D40x Digital Camera

1 Answer

Motorolla v3i camera is not working


you should take the phone back to the store and have them fix the phone..the firmware needs to be flash on the phone.

Dec 11, 2008 | Motorola Mobility RAZR V3i Cellular Phone

1 Answer

COPY PROBLEM


You have a scanner problem.  You might try and make sure you're using the right plug for it.  If you can figure out how to take the glass off, you should try cleaning all the glass and mirrors.  You should also clean the area just above where the scanner rests when it's not being used (you'll see a white strip there).  If none of this works, you'll probably need a new scanner.  Junk the thing.

Oct 26, 2007 | Canon imageCLASS MF5550 All-In-One Laser...

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